September 2010
NIOSH Publication Number 2010-168c

Diquat (Diquat dibromide)

Synonyms & Trade Names
Diquat dibromide; 1,1'-Ethylene-2,2'-bipyridyllium dibromide [Note: Diquat is a cation (C12H12N2++; 1,1'-Ethylene-2,2-bipyridyllium ion). Various diquat salts are commercially available.]
CAS No.
85-00-7
RTECS No.
JM5690000
DOT ID & Guide
2781 131 (liquid)
Formula
C12H12N2Br2
Conversion
IDLH
N.D.
See: IDLH INDEX
Exposure Limits
NIOSH REL
: TWA 0.5 mg/m3
OSHA PEL
†: none
Measurement Methods

None available
Physical Description
Dibromide salt: Yellow crystals. [herbicide] [Note: Commercial product may be found in a liquid concentrate or a solution.]
MW:
344.1
BP:
Decomposes		 MLT: 635°F
Sol:
70%
VP:
<0.00001 mmHg
IP:
?
Sp.Gr:
1.22-1.27
Fl.P:
?
UEL:
?
LEL:
?
Combustible Solid, but does not readily ignite and burns with difficulty.
Incompatibilities & Reactivities
Alkalis, UV light, basic solutions [Note: Concentrated diquat solutions corrode aluminum.]
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms
irritation eyes, skin, mucous membrane, respiratory system; rhinorrhea (discharge of thin nasal mucus), epistaxis (nosebleed); skin burns; nausea, vomiting, diarrhea, malaise (vague feeling of discomfort); kidney, liver injury; cough, chest pain, dyspnea (breathing difficulty), pulmonary edema; tremor, convulsions; delayed healing of wounds
Target Organs
Eyes, skin, respiratory system, kidneys, liver, central nervous system
Personal Protection/Sanitation
(See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Quick drench
First Aid
(See procedures)
Eye: Irrigate immediately
Skin: Water flush immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations

Not available.

Important additional information about respirator selection

See also: INTRODUCTION   See ICSC CARD: 1363